Add return values to SyncerCommand

chrome/browser/sync/engine/build_commit_command.h

Index: chrome/browser/sync/engine/build_commit_command.h
diff --git a/chrome/browser/sync/engine/build_commit_command.h b/chrome/browser/sync/engine/build_commit_command.h
index ca7d41245b89ae8fb80f873ffe8a1abd21ed796a..fca253500465379c0f54ace930db1c6dfdb17a61 100644
--- a/chrome/browser/sync/engine/build_commit_command.h
+++ b/chrome/browser/sync/engine/build_commit_command.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
@@ -20,7 +20,7 @@ class BuildCommitCommand : public SyncerCommand {
   virtual ~BuildCommitCommand();
 
   // SyncerCommand implementation.
-  virtual void ExecuteImpl(sessions::SyncSession* session) OVERRIDE;
+  virtual SyncerError ExecuteImpl(sessions::SyncSession* session) OVERRIDE;
 
  private:
   FRIEND_TEST_ALL_PREFIXES(BuildCommitCommandTest, InterpolatePosition);